What are the blank answers ? confused

Blank #1) Glucose

Blank #2) I'm guessing acetyl-CoA

Blank #3) 38 net

Explanation:

I'm guessing glucose for #1 because it goes into the pyruvate gets converted to acetyl-CoA which releases carbon dioxide, and aerobic respiration produces 38 atp.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.